This document applies to TBS1000 models with no display
adapter module.
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to perform ing service.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published m aterial. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
OpenChoice is a registered trademark of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O . Box 5 00
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.
Table of Contents
General safety summary .................. .................................. .................................. ....vi
Service safety summary..........................................................................................viii
Review the fo
this product or any products connected to it.
To avoid pot
Only qualified personnel should perform service procedures.
Use proper
certified for the country of use.
Connect a
instrument before connecting the probe to the circuit under test. Connect the
probe reference lead to the circuit under test before connecting the probe input.
Disconnect the probe inpu t and the probe reference lead from the circuit under test
before disconnecting the probe from the measurement instrument.
Ground the product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
nals of the product, ensure that the product is properly grounded.
termi
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
arkings on the product. Consult the product manual for further ratings
and m
information before making connections to the product.
llowing safety precautions to avoid injury and prevent damage to
ential hazards, u se this product only as specified.
power cord. Use only the power cord specified for this product and
nd disconnect properly. Connect the probe output to the measurement
nect the probe reference lead to earth ground only.
Con
Do not apply a potential to any terminal, including the comm o n terminal, that
eeds the maximum ratingofthatterminal.
exc
Power disconnect. The power switch disconnects the product from the power
urce. See instructions for the location. Do not block the power switch; it must
so
remain accessible to the user at all times.
o not operate without covers. Do not operate this product with covers or panels
D
removed.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
viTBS1000 Series Oscilloscope Service Manual
General safety summary
Terms in this manual
Symbols and terms on the
product
Do not operate i
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
Provide prop
on installing the product so it has proper ventilation.
These terms may a ppear in this manual:
WAR N ING.
in injury or loss of life.
CAUTION
damage to this product or other property.
These t
erms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read
the ma
n wet/damp conditions.
er ventilation. Refer to the manual's installation instructions for details
Warning statements identify conditions or practices that could result
. Caution statements identify conditions or practices that could result in
rking.
WARNING indicates an injury hazard not immediately accessible as you
the marking.
read
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
TBS1000 Series Oscilloscope Service Manualvii
Service safety summ a ry
Service safet
ysummary
Only qualifiesafety summary and the General safety summary before performing any service
procedures.
Do not service alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use care when servicing with power on. Dangerous voltages or currents may exist
in this p
test leads before removing protective panels, soldering, or replacing components.
To avoi
d personnel should perform service procedures. Read this Service
roduct. Disconnect power, remove battery (if applicable), and disconnect
d electric shock, do not touch exposed connections.
viiiTBS1000 Series Oscilloscope Service Manual
Preface
Manual Conventions
This service manual provides information to verify performance of, calibrate,
troubleshoot, disassemble, and replace parts on the TBS1000 Series Digital
Storage Osci
Unless noted otherwise, the term "oscilloscope" refers to all models in the
TBS1000 ser
lloscopes.
ies.
Modules
Replaceable Parts
Safety
Related Documentation
This manu
before attempting service.
Throughout this manual, any replaceable component, assembly, or part is referred
to by the
A module is composed of electrical and mechanical assemblies, circuit cards,
interc
This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
aceable part is any circuit board or assembly, such as the hard disk drive, or a
repl
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list.
Sym
at the beginning of this manual.
al uses certain conventions that you should become familiar with
he oscilloscope user manual, available on the Tektronix Web
T
site.Go to www.tektronix.com/manuals and search for the user
manual for your product (available in 11 languages).
The oscilloscope programmer manual, available on the Tektronix
Web site. Go to www.tektronix.com/manuals and search for the
programmer m anual for your product.
Preface
xTBS1000 Series Oscilloscope Service Manual
Specifications
Specifications
These specifications apply to all TBS1000 series oscilloscopes. To verify that an
oscilloscope meets specifications, it must first meet the following conditions:
The oscilloscope must have been operating continuously for twenty minutes
within the specified ope rating temperature.
You must perform the Do Self Cal operation, accessible through the Utility
menu, if the operating temperature has changed by more than 5 °C (9 °F)
since the l
The oscilloscope must be within the factory calibration interval of o ne year.
Specifications are provided in the following tables. All specifications are
guaranteed unless noted "typical." Specifications that are marked with the symbol
are chec
Ver ification.)
Signal Acquisition System Characteristics
NOTE. All amplitude-related or modified speci fications require 1X probe
attenuation factors unless otherwise specified. This is due to the way the displayed
itivity works. This does not affect actual methods of attachment. It only alters
sens
the relationship between displayed scale factors and the specifications.
ast time the Do Self Cal operation w as performed.
ked in the Performance Verification section. (See page 4-1, Performance
le 1-1: Signal acquisition system characteristics
Tab
cription
Characteristic
Number of Input
Channels
Input CouplingDC, AC, or GND
Input Impedance, DC
Coupled
Des
TBS1152
TBS1102
S1062
TB
TBS1042
TBS1022
BS1154
T
TBS1104
TBS1064
1MΩ ±2%inparallelwith20pF±3pF
nominally identical channels, sampled
Two
simultaneously.
Four nominally identical channels, sampled
imultaneously
s
TBS1000 Series Oscilloscope Service Manual1–1
Specifications
Table 1-1: Signal acquisition system characteristics (cont.)
Characteristic
Maximum Input Voltage
Description
At the front panel connector, 300 V
, Installation Category II; derate at 20 dB/decade above 100 kHz to
RMS
13 V peak AC at 3 MHz and above.
Based on sinusoidal or DC input signal. The maximum viewable signal while DC coupled is ±50 V offset
±5 V/div at 4 divisions, or 70 V. AC coupling allows measuring signals on a DC level up to 300 V. For
nonsinusoidal waveforms, peak value must be less than 450 V. Excursions above 300 V should be less
than 100 ms in duration, and the duty factor is limited to < 44%. The RMS signal level must be limited to
300 V. If these values are exceeded, damage to the instrument may result.
8 bits except at 2 mV/divNumber of Digitized B its
Displayed vertically with 25 digitization levels per division, 10 divisions dynamic range.
2 mV/div setting is generated by digital multiplication and the resolution is reduced. Given 100 levels
available, the resolution is >6.5 bits.
Sensitivity Range2 m V/div to 5 V/div in 1-2-5 sequence with the probe attenuation set to 1X.
Display Gain Variable
The Display Gain Variable function allows the user to vary the vertical display gain continuously over the
full range.
Resolution is that of the coarse gain from which these data are constructed. Fine gain values (for
instance 120 mV/div) are acquired at the next higher coarse gain setting (in this case 200 mV/div).
The Display Gain Variable is achieved by digital multiplication of the data to obtain the settings between
the 1-2-5 gain settings.
Hard copy outputs to printer will be exactly the same as seen on screen even when the Display Gain
Variable is used.
However, WAVEFORM DATA obtained through the I/O interface is limited to the 1-2-5 gain settings.
Probe Scale Factors
1X, 10X, 20X, 50X, 100X, 500X, 1000X voltage attenuation.
5, 1, 500 m, 200 m, 20 m, 10 m, 1 m V/A current scale factor.
This adjusts the display scale factor of the instrument to accommodate various probe types.
Accuracy of the probe used must be added to the accuracy specifications of instrument.
No automatic probe interface is provided, so you must verify that the settings match the probe
characteristics. The probe check function allows setting of the proper attenuation for voltage probes.
Acquisition Modes
Sample, Peak Detect, Average
Envelope mode not provided
Retained Front Panel
Settings
Front panel settings are retained when the instrument power is turned off and on with the power switch.
The settings are retained when the line power is turned off and on.
The instrument periodically saves front panel se ttings after settings are changed. There is a delay of
three seconds after the last change and before the storage of the settings in memory.
1–2TBS1000 Series Oscilloscope Service Manual
Table 1-1: Signal acquisition system characteristic s (cont.)
Specifications
Characteristic
Math Modes
Voltage Measurement
Functions
√ DC Gain Accuracy,
Sample or Average
Acquisition
DC Voltage
Measurement Accuracy,
Average Acquisition
Mode
Delta Volts Measurement
Accuracy, Average
Acquisition Mode
This is the difference between the measured DC gain and the nominal DC gain, divided by the nominal
DC gain and expressed as a percent.
±3%, 5 V/div through 10 mV/div
±4%, 5 mV/div and 2 mV/div
Vertical position = 0: ±(3% of |reading| + 0.1 div + 1 mV)
Vertical position ≠ 0 and vertical scale = 2 mV/div to 200 mV/div: ±[3% of |reading + vertical position|
+ 1% of |vertical position| + 0. 2 div + 7 m V]
Vertical position ≠ 0 and vertical scale > 200 mV/div: ±[3% of |reading + vertical position| + 1% of
|vertical position| + 0.2 div + 175 mV]
Delta volts between any two averages of 16 waveforms acquired under the s ame setup and ambient
conditions.
(3% of |reading| + 0.05 div)
Defined in Section 4.6 of IEEE std 1057. The difference between the upper and lower frequencies, at
which the amplitude response, as seen in the data record, is 0.707 (-3 dB) of the response seen in the
data record at the specified reference frequency. Specifies only the -3 dB point. It does not include
the in-band response.
TBS1000 Series Oscilloscope Service Manual1–3
Specifications
Table 1-1: Signal acquisition system characteristics (cont.)
Characteristic
√ Analog Bandwidth,
DC Coupled, Sample or
Average
Analog Bandwidth, DC
Coupled, Peak Detect,
typical
This is analog bandwidth when the instrument is DC coupled in sample or average mode. V/div values
are accurate for probe attenuation settings of 1X. No probe should be installed for these measurements.
System bandwidth is type tested to be equivalent to this specification with the provided probe in 10X
mode. Use Section 4.6.1 of IEEE 1057, with the reference frequency of 1 kHz at an amplitude of
5 divisions, driven from a 50 Ω source with external termination at the input BNC (25 Ω effective source).
TBS1154, TBS1152:
DC to ≥ 150 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full. < 5 mV/div settings
are limited to 20 MHz bandwidth.
TBS1104, TBS1102:
DC to ≥ 100 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full. < 5 mV/div settings
are limited to 20 MHz bandwidth.
TBS1064, TBS1062:
DC to ≥ 60 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 MV/div settings
are limited to 20 MHz bandwidth.
TBS1042:
DC to ≥ 40 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 mV/div settings
are limited to 20 MHz bandwidth.
TBS1022:
DC to ≥ 25 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full. < 5 mV/div settings are
limited to 20 MHz bandwidth.
This is the analog bandwidth when th e instrument is DC coupled. V/div values are accurate for probe
attenuation settings of 1X. No probe should be installed for these measurements.
TBS1154, TBS1152, TBS1104, TBS1102:
DC to ≥ 75 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less
than 5 mV/div are limited to 20 MHz bandwidth.
TBS1064, TBS1062:
DC to ≥ 50 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less
than 5 mV/div are limited to 20 MHz bandwidth.
TBS1042:
DC to ≥ 30 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less
than 5 mV/div are limited to 20 MHz bandwidth.
TBS1022:
DC to ≥ 20 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full.
20 MHz bandwidth limit ON/OFF
This is the upper frequency for Analog Bandwidth when the instrument has 20 MHz bandwidth limiting
turned on.
20 MHz
Bandwidth of all trigger paths are similarly limited, except the External Trigger, which is not affected
by BW Limit function. Each channel is separately limited, allowing different bandwidths on different
channels of the same instrument.
1–4TBS1000 Series Oscilloscope Service Manual
Table 1-1: Signal acquisition system characteristic s (cont.)
Specifications
Characteristic
Lower- Frequency Limit,
AC Coupled
Rise Time, typical
Peak Detect Mode Pulse
Response
Description
This is the lower frequency for Analog Bandwidth when the instrument is AC-coupled
≤ 10 Hz.
<1 Hz when 10X, passive probes are used.
Model
TBS1154, TBS1152
TBS1104, TBS1102
TBS1064, TBS1062
TBS1042
TBS1022
Rise time is generally calculated from the following formula: Rise time in ns = 350 / Bandwidth in MHz
This is the capability of the instrument to capture single event pulses using the Peak Detect Acquisition
Mode.
The minimum single pulse widths for guaranteed 50% or greater amplitude capture are as follows:
Model
TBS1154
TBS1152
TBS1104
TBS1102
TBS1064
TBS1062
Expected full bandwidth rise time
2.6 ns
3.5 ns
6.0 ns
8.8 ns
14.0 ns
Sec/Div Setting
50 sec/div to 5 μS/div
Minimum Pulse Width
12 ns
Vertical Position Ranges
√ Vertical Position
Accuracy
TBS1042
TBS1022
These are the ranges of the user-settable input offset voltage.
Volts/Div Setting
2 mV/div to 200 mV/div
> 200 m V /div to 5 V/div
This is the accuracy of the nominal voltage level represented by the code at the vendor of the A-D
converter's dynamic range.
Volts/Div Setting
2 mV/div to 200 mV/div±(1% of |selected value| + 0.1 div + 5 mV) within the
> 200 mV/div to 5 V/div±(1% of |selected value| + 0.1 div + 125 mV) within the
50 sec/div to 5 μS/div
Position Range
±1.8V
±45V
Position Accuracy
range ±1.8 V
range ±45 V
13 ns
TBS1000 Series Oscilloscope Service Manual1–5
Specifications
Table 1-1: Signal acquisition system characteristics (cont.)
Common Mode
Rejection Ratio (CMRR),
typical
Crosstalk (Channel
Isolation)
With the same signal applied to each channel, CMRR is the ratio of the acquired signal amplitude to the
amplitude of the MATH difference waveform, either (Channel 1 - Channel 2), (Channel 2 - Channel 1)
Model
TBS1154
TBS1152
TBS1104
TBS1102
TBS1064
TBS1062
TBS1042
TBS1022
Section 4.11.1 of IEEE std. 1057. It is the ratio of the level of a signal input into one channel to that of
the s ame signal present in another channel due to stray coupling.
Model
TBS1154, TBS1152≥ 100:1 with a 75 MHz sine wave and with equal V/div settings on each
TBS1104, TBS1102≥ 100:1 with a 50 MHz sine wave and with equal V/div settings on each
TBS1064, TBS1062≥ 100:1 with a 30 MHz sine wave and with equal V/div settings on each
TBS1042≥ 100:1 with a 20 MHz sine wave and with equal V/div settings on each
TBS1022≥ 100:1 with a 10 MHz sine wave and with equal V/div settings on each
Common Mode Rejection Ratio
100:1 at 60 Hz, reducing to 10:1 with 50 MHz sine wave, with equal
Volts/Div and Coupling settings on each channel.
100:1 at 60 Hz, reducing to 20:1 with a sine wave with frequency equal to
½ the -3 dB bandwidth and with equal Volts//Div and Coupling settings
on each channel.
Crosstalk
channel
channel
channel
channel
channel
Time Base System
Table 1-2: Time base system
Characteristic
Sample-Rate Range
1–6TBS1000 Series Oscilloscope Service Manual
Description
This is the range of real-time rates, expressed in samples/second, at which a digitizer samples signals at
its inputs and stores the samples in memory to produce a record of time-sequential samples. ( IEEE
1057, 2.2.1)
Model
TBS1154, TBS1152
TBS1104, TBS1102
TBS1064, TBS1062
TBS1042
TBS1022
Sample-rate range
5 S/s to 1000 MS/s
5 S/s to 500 MS/s
Table 1-2: Time b ase system (cont.)
Specifications
Characteristic
Record Length
√ Long-Term Sample
Rate and Horizontal
Position Time Accuracy
Horizontal Position Time
Range
Horizontal Window
Display
Delta Time Measurement
Accuracy
Time Measurement
Functions
Description
(Sin x)/x interpolationWaveform Interpolation
Waveform interpolation is activated for sweep speeds of 100 ns/div and faster.
This is the total number of samples contained in a single acquired waveform record (Memory Length in
IEEE 1057.2.2.1).
2,500 samples per record.
5 ns/div to 50 s/div in 1–2.5–5 sequenceSeconds/Division Range
Sec/Div Variable function is not available for this product.
This is the maximum, total, long-term error in sample-rate or horizontal position time accuracy, expressed
in parts per million.
±50 ppm over any ≥1 ms interval.
Horizontal scale settingHorizontal position time range
5ns/divto10ns/div
25 ns/div to 100 μs/div
250 μs/divto10s/div
25 s/div to 50 s/div
The user controls the time from the trigger to the center graticule on the display with the Horizontal
Position knob.
The resolution of the Horizontal Position time is 1/25 of a horizontal division.
The Window Zone enables a user to select a part of the display to be magnified. The user controls the
location with the H orizontal Position knob and the width with the Sec/Div knob. Vertical cursors show the
selected zone. To magnify the zone, the user selects the window from the menu.
This is the accuracy of delta time measurements made on any single waveform.
The limits are given in the following table for signals having an amplitude ≥ 5 divisions, a slew rate at the
measurement points of ≥ 2.0 divisions/ns, and acquired ≥ 10 mV/div.
Condition
Single shot, sample m ode,
full bandwidth selected
> 16 averages,
full bandwidth selected
The Sample Interval is the time between the samples in the waveform record.
Frequency, Period, Rise Time, Fall Time, Positive Width, negative Width, Positive Duty Cycle, Phase,
Delay
–4 div * s/div to 20 ms
–4 div * s/div to 50 ms
–4 div * s/div to 50 s
–4 div * s/div to 250 s
External/5 selection attenuates the external signal by 5.
When Ba
limited. The bandwidth of the External Trigger path is not affected by the bandwidth limit.
The tri
500 ns
The ab
settings less than 100 ms/Div. This is because Holdoff cannot be set in Scan Mode, which begins at
100 ms/div when Trigger Mode is AUTO. By adjusting Trigger Mode to NORMAL, the Scan Mode
oper
1M±2
300
and above
Based on sinusoidal or DC input signal. T he maximum viewable signal while DC coupled is ±50 V offset
±5 V/div at 4 divisions, or 70 V. AC coupling a llow s measuring signals on a DC level up to 300 V. For
no
than 100 ms duration and the duty factor is limited to < 44%. RMS signal level m ust be limited to 300 V. If
these v alues are exceeded, damage to the instrument may result.
Line Trigger mode provides a source to synchronize the trigger with the AC line input.
nput Amplitude requirements: 85 V
I
Input Frequency requirements: 45 Hz - 440 Hz.
ndwidth Limit is selected for a channel, the bandwidth of that channel’s trigger path will also be
gger position is set by the Horizontal Position knob.
minimum to 10 s maximum
ility to s et large values of Holdoff is limited by the difficulty in adjusting the Holdoff at Sec/Div
ation is turned off, and Holdoff can be adjusted at larger seconds/Div settings.
%inparallelwith20pF±3pF
V
, Installation Category II; derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz
RMS
nsinusoidal waveforms, peak value must be less than 450 V. Excursions above 300 V should be less
Channel 1
Channel 2
External
External/5
AC Line
Channel 1
Channel 2
Channel 3
Channel 4
External
External/5
AC Line
- 265 VAC.
AC
1–8TBS1000 Series Oscilloscope Service Manual
Table 1-3: Triggering system (cont.)
CharacteristicDescription
AC, DC, Noise Reject, High Frequency Reject, Low Frequency RejectTrigger Coupling
The External Trigger path does not have a DC blocking capacitor ahead of the trigger input circuit. The
rolloff associated with AC coupling happens after the input circuit. When attempting to trigger on an AC
signal that has a DC offset, care must be used to avoid overloading the input of the External Trigger
circuit. For signals that have a large DC offset, using Channel 1 or Channel 2 (and Channel 3 or Channel
4 for the TBS1154, TBS1104, and TBS1064) with AC coupling is preferred.
Trigger Slope
√ Sensitivity,
Edge-Type Trigger,
DC Coupled
Rising Edge, Falling Edge
Measurement Style A) The minimum signal levels for achieving stable frequency indication on the Trigger
Frequency Counter within 1% of correct indication.
Measurement Style B) Section 4 10.2 in IEEE Std. #1057. The minimum signal levels required for stable
edge triggering of an acquisition when the trigger Source is DC coupled.
Trigger SourceSensitivity (Measurement
Channel Inputs
Ext
Ext/5
Trigger Frequency Readout typically stabilizes at 50% more signal than generates a stable visual display.
for Successful
Operation of “Set
Level to 50%”
Function, typical
Trigger Level
Ranges, typical
Trigger Level
Accuracy, DC
Coupled, typical
Video Trigger
Default Settings
for Video Trigger
Video Trigger
Source Selection
Video Trigger
Polarity Selection
Video Sync
Selection
Formats and Field
Rates
Trigger SourceSensitivity
ACSame as DC Coupled limits for frequencies 50 Hz and
Noise Rej
HF Rej
LF RefSame as DC Coupled limits for frequencies above 300 kHz.
Since AC coupling is not done in the front end, use of a 10M probe does not affect the low frequency
corner.
50 Hz.Lowest Frequency
Using a 10M probe will not affect the operation of this function.
Input Channel±8 divisions from center screen
Ext±1.6 V
Ext/5:
The settable resolution for Trigger Level is 0.02 division for an input channel source, 4 mV for Ext source,
and 20 mV for Ext/5 source.
This is the amount of deviation allowed between the level on the waveform at w hich triggering occurs and
the level selected for DC-coupled triggering signals
±(0.2 div + 5 mV) for signals within ±4 divisions from the center screen, having rise and fall times
of ≥ 20 ns.
Ext: ±(6% of setting + 40 mV) for signals less than ±800 mV
Ext/5: ±(6% of setting + 200 mV) for signals less than ±4 V
Trigger Mode: Auto
Trigger Coupling: AC
Same as Source Selections listed above except Line Trigger. Line Trigger source is meaningless in
this mode.
Normal (Negative going Sync Signal), Invert (Positive going Sync Signal)
Line, Line #, Odd Field, Even Field, Field: PAL/SECAM, NTSC formats
Fieldrates: 50Hzto60Hz.Video Trigger
Line rates: 15 kHz to 20 kHz (NTSC, PAL, SECAM)
above
Effective in Sample or Average Mode, > 10 mV/div to
5 V/div. Reduces DC Coupled trigger sensitivity by 2X.
Same as DC Coupled limits from DC to 7 kHz.
Falling edge for positive polarity pulse. Rising edge for negative polarity pulse.
16.5 ns or 1 part per thousand, whichever is larger
t > 330 ns: ±5% < guardband < ±(5.1% + 16.5 ns)
t ≤ 330 ns: guardband = ±16.5 ns.
All pulses, even from the most stable sources, have some amount of jitter. To avoid disqualifying pulses
that are intended to qualify but are not absolutely c orrect values, we provide an arbitrary guardband. Any
measured pulse width within the guardband will qualify. If you are looking for pulse width differences that
are smaller than the guardband width, offsetting the center should allow discriminating differences down
to the guardband accuracy.
330 ns < 1: ±5% ≤ guardband < ±(5.1% + 16.5 ns)
165 ns < 1 < 330 ns: guardband = -16.5 ns/+33 ns
t ≤ 165 ns: guardband = ± 16.5 ns
All pulses, even from the most stable sources, have some amount of jitter. To avoid disqualifying pulses
that are intended to qualify but are not absolutely c orrect values, we provide an arbitrary guardband. Any
measured pulse width outside the guardband will qualify. If you are looking for pulse width differences
that are smaller than the guardband width, offsetting the center should allow discriminating differences
down to the guardband accuracy. Not equal has slightly better ability to deal with small pulse widths
than equal. T he accuracy is not better.
Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.
Not Equal: If the pulse is narrower than the specified width, the trigger point is the trailing edge. Otherwise,
the oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width.
Less than: The trigger point is the trailing edge.
Greater than (also called the time out trigger): The oscilloscope triggers when a pulse continues longer
than the time specified as the Pulse Width.
This provides a highly accurate means of identifyi ng the frequency of trigger signals. Since averaging
takes place over a longer time span, the number of stable digits is improved over the automatic
measurement of the same type.
Specifications
Typical sensitivity
400 mV of composite video
TBS1000 Series Oscilloscope Service Manual1–11
Specifications
Table 1-3: Triggering system (cont.)
Frequency
Counter
Resolution
Frequency
Counter Accuracy,
typical
Frequency
Counter
Frequency Range,
typical
Counter Signal
Source
6 digits
±51 ppm including all reference errors and ±1 count errors.
AC coupled. 10 Hz minimum to rated bandwidth.
Pulse width or edge selected trigger source.Frequency
Frequency counter measures selected trigger source at all times in pulse width and edge mode, including
when oscilloscope acquisition is halted due to changes in run status, or acquisition of a single shot
event has completed.
Frequency counter does NOT m easure pulses that do not qualify as legitimate trigger events.
Pulse Width mode: Counts pulses of sufficient magnitude inside the 250 ms measurement window
that qualify as triggerable events (for example, all narrow pulses in a PWM pulse train if set to < mode
and the limit is set to a relatively small number).
Edge Trigger mode: Counts all pulses of sufficient magnitude.
Display Specifications
Table 1-4: Display specifications
CharacteristicDescription
Display Type
Display Resolution
Brightness, typical
Contrast Ratio and
Control, typical
11.5 cm (width) * 8.64 cm (height), 14.3 cm diagonal (5.7”), QVGA, active TFT color liquid crystal display
(LCD) with color characters/waveforms on a black background. Surface antiglare (3H) treatment.
This is the number of individually addressable pixels
320 horizontal by 240 vertical pixels
The video display contains both the character and waveform displays.
This is the light output of the backlight.
400 cd/m
Available black room contrast ratio, full black to full white. 400 minimum, 500 typical.
2
, typical. 320 cd/m2min.
1–12TBS1000 Series Oscilloscope Service Manual
Specifications
Interfaces an
d Output Ports Specifications
Table 1-5: Interfaces and output ports specifications
Characteris
USB DeviceUSB 2.0 Full S
USB HostUSB 2.0 Full Speed host. 12 Mb/sec maximum. Supports USB Mass Storage Class. Bulk Only Subclass
USB Host CurrentProvides full 0.5 A of 5 V.
GPIB InterfaceGPIB access via TEK-USB-488 accessory.
Output V
Frequency, typical
Data Ha
tic
oltage and
Description
USB-TMC communications with Tektronix extensions.
Standard
only. Prov
Standard
Standard
Output voltage: 5.0 V ±10% into 1 MΩ load.Probe Compensator,
Frequency: 1 kHz
ides full 0.5 A of 5 V.
ndling Characteristics
peed device. 12 Mb/second maximum. Supports PICTBRIDGE compatibility and provides
Table 1-6: Data handling characteristics
cteristic
Chara
ntion of Front
Rete
Panel Settings
Stored Waveforms and
Multiple Front Panel
tings
Set
iption
Descr
Front panel settings are stored periodically in memory. The settings are not lost when the instrument is
ed off or if there is a power failure.
turn
Two Channel 1, Channel 2, or Math waveforms can be stored in nonvolatile waveform memory A or B.
One, both, or neither of A or B waveform memories can be displayed. For the TBS1154, TBS1104, and
1064, four waveforms, A, B , C, D, or Math can be stored. Ten user s etups of the current instrument
TBS
settings can be saved and restored from nonvolatile memory. Additional storage is available when an
appropriate mass storage device is connected via USB.
Power Distribution System
ble 1-7: Power distribution system
Ta
CharacteristicDescription
ess than 30 W at 85 to 275 V
Power Consumption
Source VoltageFull Range: 100 to 240 V
Source Frequency360 Hz to 440 Hz from 100 VACto 120 VAC.
Fuse Rating
L
ACRMS
45 Hz to 66 Hz from 100 V
3.15 Amps, T rating, 250 V; IEC and UL approved.
input.
AC
± 10%, Installation Category II (Covers range of 90 to 264 V
to 240 VAC.
AC
AC
TBS1000 Series Oscilloscope Service Manual1–13
Specifications
Mechanical Ch
aracteristics
Table 1-8: Mechanical characteristics
Characteris
Weight
Size
Cooling
tic
Method
Description
Requirement
2.0 kg (4.4 lbs), stand-alone instrument
2.2 kg (4.9 lbs), with accessories
3.6kg(8lbs
Height
Width
Depth
Convect
s that follow are nominal:
), when packaged for domestic shipment
ion cooled
Environmental Performance
Table 1-9: Environmental performance
CharacteristicDescription
Temperature
Humidity
Altitude
Operating0° C to +50° C (32 °F to 122 °F), with 5° C/minute maximum gradient,
Nonoperating
ating
Oper
Nonoperating
erating
Op
Nonoperating
158 mm (6.2
326.3 mm (1
124.1 mm (
nonco
–40°
5% to
5% to 45% RH above +40° C up to +50° C, noncondensing, and as limited
by a Maximum Wet-Bulb Temperature of +37° C (derates relative humidity
5 % RH at +50° C)
to 4
o 85% relative humidity (% RH) at up to +40° C
5% t
5% to 45% RH above +40° C up to + 50° C, noncondensing.
Above +50° C limited by a Maximum Wet-Bulb Temperature of +37° C
erates relative humidity to 12% RH at +71° C)
(d
to 3000 meters (10,000 feet)
Up
p to 3000 meters (10,000 feet).
U
Altitude is limited by possible damage to the LCD at higher altitudes. This
damage is independent of operation
2in)
2.85 in)
4.88 in)
ndensing, up to 3000 m altitude
C to +71° C (–40 °F to 159.8 °F), with 5° C/minute maximum gradient
85% relative humidity (% RH) at up to +40° C
Data Logging System Characteristics
NOTE. This software feature directs the oscilloscope to autom atically collect
data over a period of time. Afte r you configure the trigger conditions to use,
you can use the data logging menu to set up the oscilloscope so that it will save
all of the triggered waveform to a USB memory device, within a time duration
that you have set.
1–14TBS1000 Series Oscilloscope Service Manual
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